package com.sky.service.impl;

import com.sky.service.ReportService;
import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;

import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;

    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> DateList = getDateList(begin, end);
        List<Double> TurnoverList = new ArrayList();
        for (LocalDate localDate : DateList) {
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);
            Map map = new HashMap();
            map.put("begin", beginTime);
            map.put("end", endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);
            turnover = turnover == null ? 0 : turnover;
            TurnoverList.add(turnover);

        }
        String turnoverList = StringUtils.join(TurnoverList, ",");
        String dateList = StringUtils.join(DateList, ",");
        TurnoverReportVO turnoverReportVO = new TurnoverReportVO();
        turnoverReportVO.setDateList(dateList);
        turnoverReportVO.setTurnoverList(turnoverList);
        return turnoverReportVO;
    }


    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = getDateList(begin, end);
        List<Integer> totalUserList = new ArrayList<>();
        List<Integer> newUserList = new ArrayList<>();
        for (LocalDate localDate : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);
            Map map = new HashMap();
            map.put("end", endTime);
            Integer totalUser = userMapper.countByMap(map);
            totalUserList.add(totalUser);
            map.put("begin", beginTime);
            Integer newUser = userMapper.countByMap(map);
            newUserList.add(newUser);

        }
        String DateList = StringUtils.join(dateList, ",");
        String TotalUserList = StringUtils.join(totalUserList, ",");
        String NewUserList = StringUtils.join(newUserList, ",");
        UserReportVO userReportVO = UserReportVO.builder()
                .dateList(DateList)
                .newUserList(NewUserList)
                .totalUserList(TotalUserList)
                .build();

        return userReportVO;
    }

    @Override
    public OrderReportVO getOrdersStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = getDateList(begin, end);
        List<Integer> totalOrderList = new ArrayList<>();
        List<Integer> effectiveOrderList = new ArrayList<>();
        int allTotalOrder = 0;
        int allEffectiveOrder = 0;
        for (LocalDate localDate : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);
            Map map = new HashMap();
            map.put("begin", beginTime);
            map.put("end", endTime);
            Integer totalOrder = orderMapper.countByMap(map);
            allTotalOrder += totalOrder;
            totalOrderList.add(totalOrder);
            map.put("status", Orders.COMPLETED);
            Integer EffectiveOrder = orderMapper.countByMap(map);
            allEffectiveOrder += EffectiveOrder;
            effectiveOrderList.add(EffectiveOrder);
        }
       Double CompletionRate = (double) allEffectiveOrder / allTotalOrder;
            String DateList = StringUtils.join(dateList, ",");
            String TotalOrderList = StringUtils.join(totalOrderList, ",");
            String EffectiveOrderList = StringUtils.join(effectiveOrderList, ",");
           OrderReportVO orderReportVO= OrderReportVO.builder()
                    .dateList(DateList)
                    .totalOrderCount(allTotalOrder)
                    .orderCountList(TotalOrderList)
                    .validOrderCountList(EffectiveOrderList)
                    .validOrderCount(allEffectiveOrder)
                    .orderCompletionRate(CompletionRate)
                    .build();
            return orderReportVO;
        }

    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> salesTop10 =orderMapper.getSalesTop10(beginTime,endTime);
        List<String> top10Name=salesTop10.stream().map(GoodsSalesDTO:: getName ).collect(Collectors.toList());
        List<Integer> top10Count=salesTop10.stream().map(GoodsSalesDTO:: getNumber ).collect(Collectors.toList());
        String nameList=StringUtils.join(top10Name,",");
        String numberList=StringUtils.join(top10Count,",");
        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }
    /**
     * 导出运营数据报表
     * @param response
     */
    public void exportBusinessData(HttpServletResponse response) {
        //1. 查询数据库，获取营业数据---查询最近30天的运营数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);

        //查询概览数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

        //2. 通过POI将数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            //基于模板文件创建一个新的Excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);

            //获取表格文件的Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            //填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间：" + dateBegin + "至" + dateEnd);

            //获得第4行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            //获得第5行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            //填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某一天的营业数据
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

                //获得某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }

            //3. 通过输出流将Excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    private List<LocalDate> getDateList (LocalDate begin, LocalDate end){
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        return dateList;
    }
    }


